/*!
 * @file       startup_apm32e030.S
 *
 * @brief      CMSIS Cortex-M0 PLUS based Core Device Startup File for Device startup_apm32e030
 *
 * @version    V1.0.2
 *
 * @date        2025-05-15
 *
 * @attention
 *
 *  Copyright (C) 2024-2025 Geehy Semiconductor
 *
 *  You may not use this file except in compliance with the
 *  GEEHY COPYRIGHT NOTICE (GEEHY SOFTWARE PACKAGE LICENSE).
 *
 *  The program is only for reference, which is distributed in the hope
 *  that it will be useful and instructional for customers to develop
 *  their software. Unless required by applicable law or agreed to in
 *  writing, the program is distributed on an "AS IS" BASIS, WITHOUT
 *  ANY WARRANTY OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the GEEHY SOFTWARE PACKAGE LICENSE for the governing permissions
 *  and limitations under the License.
 */

  .syntax unified
  .cpu cortex-m0plus
  .fpu softvfp
  .thumb

.global g_apm32_Vectors
.global Default_Handler

.word _start_address_init_data
.word _start_address_data
.word _end_address_data
.word _start_address_bss
.word _end_address_bss

  .section .text.Reset_Handler
  .weak Reset_Handler
  .type Reset_Handler, %function

// Reset handler routine
Reset_Handler:
// User Stack and Heap initialization
  ldr   r0, =_end_stack
  mov   sp, r0

  ldr r0, =_start_address_data
  ldr r1, =_end_address_data
  ldr r2, =_start_address_init_data
  movs r3, #0
  b L_loop0_0

L_loop0:
  ldr r4, [r2, r3]
  str r4, [r0, r3]
  adds r3, r3, #4

L_loop0_0:
  adds r4, r0, r3
  cmp r4, r1
  bcc L_loop0

  ldr r2, =_start_address_bss
  ldr r4, =_end_address_bss
  movs r3, #0
  b L_loop1

L_loop2:
  str  r3, [r2]
  adds r2, r2, #4

L_loop1:
  cmp r2, r4
  bcc L_loop2

  bl  SystemInit
  bl __libc_init_array
  bl main

L_loop3:
    b L_loop3

.size Reset_Handler, .-Reset_Handler

// This is the code that gets called when the processor receives an unexpected interrupt.
    .section .text.Default_Handler,"ax",%progbits
Default_Handler:
L_Loop_infinite:
  b L_Loop_infinite
  .size Default_Handler, .-Default_Handler

// The minimal vector table for a Cortex M0 Plus.
   .section .apm32_isr_vector,"a",%progbits
  .type g_apm32_Vectors, %object
  .size g_apm32_Vectors, .-g_apm32_Vectors

// Vector Table Mapped to Address 0 at Reset
g_apm32_Vectors:
  .word  _end_stack
  .word  Reset_Handler                      // Reset Handler
  .word  NMI_Handler                        // NMI Handler
  .word  HardFault_Handler                  // Hard Fault Handler
  .word  0                                  // Reserved
  .word  0                                  // Reserved
  .word  0                                  // Reserved
  .word  0                                  // Reserved
  .word  0                                  // Reserved
  .word  0                                  // Reserved
  .word  0                                  // Reserved
  .word  SVC_Handler                        // SVCall Handler
  .word  0                                  // Reserved
  .word  0                                  // Reserved
  .word  PendSV_Handler                     // PendSV Handler
  .word  SysTick_Handler                    // SysTick Handler

  // External Interrupts
  .word  WWDT_IRQHandler                    // Window Watchdog
  .word  0                                  // Reserved
  .word  RTC_IRQHandler                     // RTC through EINT Line
  .word  FLASH_IRQHandler                   // FLASH
  .word  RCM_IRQHandler                     // RCM
  .word  EINT0_1_IRQHandler                 // EINT Line 0 and 1
  .word  EINT2_3_IRQHandler                 // EINT Line 2 and 3
  .word  EINT4_15_IRQHandler                // EINT Line 4 to 15
  .word  0                                  // Reserved
  .word  DMA1_CH1_IRQHandler                // DMA1 Channel 1
  .word  DMA1_CH2_3_IRQHandler              // DMA1 Channel 2 and Channel 3
  .word  DMA1_CH4_5_IRQHandler              // DMA1 Channel 4 and Channel 5
  .word  ADC1_IRQHandler                    // ADC1
  .word  TMR1_BRK_UP_TRG_COM_IRQHandler     // TMR1 Break, Update, Trigger and Commutation
  .word  TMR1_CC_IRQHandler                 // TMR1 Capture Compare
  .word  0                                  // Reserved
  .word  TMR3_IRQHandler                    // TMR3
  .word  TMR6_IRQHandler                    // TMR6
  .word  0                                  // Reserved
  .word  TMR14_IRQHandler                   // TMR14
  .word  TMR15_IRQHandler                   // TMR15
  .word  TMR16_IRQHandler                   // TMR16
  .word  TMR17_IRQHandler                   // TMR17
  .word  I2C1_IRQHandler                    // I2C1
  .word  I2C2_IRQHandler                    // I2C2
  .word  SPI1_IRQHandler                    // SPI1
  .word  SPI2_IRQHandler                    // SPI2
  .word  USART1_IRQHandler                  // USART1
  .word  USART2_IRQHandler                  // USART2

// Default exception/interrupt handler

  .weak      NMI_Handler
  .thumb_set NMI_Handler,Default_Handler

  .weak      HardFault_Handler
  .thumb_set HardFault_Handler,Default_Handler

  .weak      SVC_Handler
  .thumb_set SVC_Handler,Default_Handler

  .weak      PendSV_Handler
  .thumb_set PendSV_Handler,Default_Handler

  .weak      SysTick_Handler
  .thumb_set SysTick_Handler,Default_Handler

  .weak      WWDT_IRQHandler
  .thumb_set WWDT_IRQHandler,Default_Handler

  .weak      RTC_IRQHandler
  .thumb_set RTC_IRQHandler,Default_Handler

  .weak      FLASH_IRQHandler
  .thumb_set FLASH_IRQHandler,Default_Handler

  .weak      RCM_IRQHandler
  .thumb_set RCM_IRQHandler,Default_Handler

  .weak      EINT0_1_IRQHandler
  .thumb_set EINT0_1_IRQHandler,Default_Handler

  .weak      EINT2_3_IRQHandler
  .thumb_set EINT2_3_IRQHandler,Default_Handler

  .weak      EINT4_15_IRQHandler
  .thumb_set EINT4_15_IRQHandler,Default_Handler

  .weak      DMA1_CH1_IRQHandler
  .thumb_set DMA1_CH1_IRQHandler,Default_Handler

  .weak      DMA1_CH2_3_IRQHandler
  .thumb_set DMA1_CH2_3_IRQHandler,Default_Handler

  .weak      DMA1_CH4_5_IRQHandler
  .thumb_set DMA1_CH4_5_IRQHandler,Default_Handler

  .weak      ADC1_IRQHandler
  .thumb_set ADC1_IRQHandler,Default_Handler

  .weak      TMR1_BRK_UP_TRG_COM_IRQHandler
  .thumb_set TMR1_BRK_UP_TRG_COM_IRQHandler,Default_Handler

  .weak      TMR1_CC_IRQHandler
  .thumb_set TMR1_CC_IRQHandler,Default_Handler

  .weak      TMR3_IRQHandler
  .thumb_set TMR3_IRQHandler,Default_Handler

  .weak      TMR6_IRQHandler
  .thumb_set TMR6_IRQHandler,Default_Handler

  .weak      TMR14_IRQHandler
  .thumb_set TMR14_IRQHandler,Default_Handler

  .weak      TMR15_IRQHandler
  .thumb_set TMR15_IRQHandler,Default_Handler

  .weak      TMR16_IRQHandler
  .thumb_set TMR16_IRQHandler,Default_Handler

  .weak      TMR17_IRQHandler
  .thumb_set TMR17_IRQHandler,Default_Handler

  .weak      I2C1_IRQHandler
  .thumb_set I2C1_IRQHandler,Default_Handler

  .weak      I2C2_IRQHandler
  .thumb_set I2C2_IRQHandler,Default_Handler

  .weak      SPI1_IRQHandler
  .thumb_set SPI1_IRQHandler,Default_Handler

  .weak      SPI2_IRQHandler
  .thumb_set SPI2_IRQHandler,Default_Handler

  .weak      USART1_IRQHandler
  .thumb_set USART1_IRQHandler,Default_Handler

  .weak      USART2_IRQHandler
  .thumb_set USART2_IRQHandler,Default_Handler
